Reinforced-concrete pole



E. MARZOU. REINFORCED CONCRETE POL-E.

APPLICATION F|LEDJuNEI8,192'o.

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APPLICATION FILED )UNE 18, 1920 1,372,362. Patented 18181.22, 1921.

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E. MAHZOLI.

REINFORCED. CONCRETE POLE.

APPLICATION FILED IIINE I8, 1920.

1,372,362, Patented Mar. 22, 1921.

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E. MARZOLI. RERNFORQED CONCRETE POLE.

APPLICATION H LED JUN-E18, 1920. Patented Mm." 22 1921. 4 SHEETS-SMU 4.

L A l Qdi EMILE MARZOLI, OF RENENS, SWITZERLAND.

REINFORCED-CONCRETE POLE.

Specification of Letters Patent.

fatented Mar. 22, 1921.

Application filed June i8, 11920. Serial No. 389,926.

To all colto/nt t may concern i Fie it known that I, ICMiLn Manzoni, master builder, a subject of the King of Italy, residing at Renens, Canton oi Vaud, in the Confederation of Switzerland, have invented certain new and useful Improvements in Reinforcedoncrete Poles, of Which the following is a specification.

The present invention relates to a rein forced concrete pole having a star shaped cross section With at least three points, at least one iron bar placed axially in the cen ter ot the star and at least one iron bar arranged near to the end of each point of the star.

The annexed drawing shows by Way of example several embodiments of the inven tion.

Figure l is an elevation showing a pole 'for supporting an aerial line of electric traction.

Fig. 2 is an elevation showing a pole for supporting telegraph and telephone lines;

Figs. 3 and 4; are elevations on an enlarged scale oil a portion or' the reinforcement oi the poles represented in. Figs. l and 2.

Figs. and 6 are cross sections on an enlarged scale ot' tivo embodiments of the invention.

Fig. 7 is a. perspective vieiv of a portion oi a mold Which may be employed for making the po-le.

Fig. 8 is an elevation showing astrengthcned reinforcement of a pole;

Fig. 9 is a side vieW of a portion of the pole;

Fig. 10 is a cross sectional view of Fig. 8 and Fig. 11 is a cross section of another form of the pole. l.

The pole a shown in Fig. l is so-lid throughout, is of monolithic construction and has a cross section as shown in Fig. 5, and it is provided at intervals With circular transverse ribs 7). The body of the pole (t comprises an iron bar c forming an axial reinforcement and iron bars d which are placed near vthe ends oi the points of the star formed by the cross section of the said body. Light reinforcements e connect the bars c and d and form diagonal reinforcements arranged as shown in Figs. 3 and 4. h are transverse reinforcements which may be more or less distant from each other.

The ribs Z9 may be employed for fixing a support f for an aerial line for electric trac tion, Aas shown in Fig. l. They may also carry a support g for telephone or telegraph lilies shown in Fig. 9.; said supports j', g, comprising iron rings g', respectively, which encircle the said ribs b.

The molding of the pole may be made for instance by means of ai mold such as shown in Fig. 7.

In this ligure the left portion shows the section of the mold at one of the ribs and the right portion the section of the mold between two ribs The transverse ribs may have another shape than an annular one, for instance as shown on Fig. G.

The pole may be made without transverse ribs.

The concrete employed for the manufac ture ot this pole may be made either With a mixture oi cement and sand or With a mix-` ture oi cement and slags or any other mate rial which may be allied to the cement.

The pole a shown in Figs. 8 to 11 is provided with annular ribs b. Its body comprises an iron bar c forming an` axial reinforcement and iron bar d arranged near the ends ott the points of the star formed by the cross section of the said body. The light reinforcements e connect the irons 0 and Z together and form diagonal reinforcements disposed as shown in Fig. 8. The iron bars d are provided on a portion of their length with strengthening irons d1, Which are bent around thesaid bars (l as shown in Fig. 7 and form a loop cl2 surrounding the axial iron bar, e. m

These reinforcements impart great resisting power to the metal frame-Work of the pole for that portion of its length Which. is the most exposed to bendingstrains Without giving to the iron bars (l throughout their entire length a section equal to the sum ot the sections off d and (Z1. That I claim is z- 1. A solid concrete pole of substantially star-shaped section and ot monolithic construction, formed at intervals with integral horizontal ribs connecting together the successive arms of the star; said pole having embedded in it a metal reinforcing framework comprising an axially-arranged vertical bar and at least one vertical bar arranged adjacent the extremity of each of said star arms, all of said bars extending from end to end of the pole, horizontal reinforcements connecting the axial bar with the several of the pole, and a strengthening bar extending alongside each last-named Vertical bar `for a portion of its length but strueturall \Y separate therefrom, said strengthening bars being bent around said last-named vertical bars and looped around the axial bar.

In testimony whereof:l I aliix my signature in presence of two witnesses.

EMILE MARZOLI. litnesses 7. TMER, THEoDoRE TMER. 

